Can I use bottled orange juice?
Yes. You will still get a good sauce. If you can, add zest from 1 orange to bring back that fresh citrus aroma. If your juice tastes a little flat, a tiny drop of orange extract (start with 1/8 teaspoon) can help, but do not overdo it.
Why is my sauce not thickening?
Two common reasons: the sauce is not simmering, or the cornstarch amount is off. Bring it to a gentle simmer (small bubbles around the edges, not a rolling boil), then whisk in the slurry and cook 60 to 90 seconds. If it is still thin, add more slurry in small amounts (1 teaspoon cornstarch mixed with 1 tablespoon water).
Why did my sauce turn cloudy or clumpy?
Cornstarch can clump if it hits hot liquid straight. Always mix it with cold water first, then whisk while pouring. If it gets clumpy anyway, whisk hard and simmer briefly, or strain it.
Is orange chicken sauce the same as sweet and sour?
They are cousins, not twins. Sweet and sour usually leans on ketchup and pineapple flavors. Orange sauce is more citrus-forward with orange zest and often a little ginger and garlic.
Can I make it gluten-free?
Yes. Use gluten-free tamari or gluten-free soy sauce (not all tamari is gluten-free unless it is labeled). Everything else here is typically gluten-free, but check labels on vinegar and chili paste if you use them.
How do I make it spicier like some takeout versions?
Add more red pepper flakes, or whisk in 1 to 2 teaspoons chili garlic sauce or a small spoon of sambal oelek. Heat plus sweet citrus is a very good combo.
Can I double the recipe?
Yes. You can scale it 1:1 with no changes. Use a slightly larger saucepan so it simmers evenly, and add an extra 30 to 60 seconds after the slurry if needed.